package io;

import java.io.FileOutputStream;
import java.io.IOException;

public class Test {
    public static void main(String[] args) throws IOException {
        FileOutputStream fos = new FileOutputStream("fos.txt");
        fos.write(97);
        for (char i = 'a'; i <='z';i++){
            fos.write(i);

        }System.out.println("写出完毕");
        fos.close();
    }
}